Wiring Circuit Board Dot Pattern Recognition via Concave Geometry
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Solution Overview
Problem
During the production of metal supporting layers for wiring circuit boards, streak grooves can form on the surface, leading to recognition errors when a dot pattern is formed on top.
Innovation Solution
The implementation of a wiring circuit board design that includes a metal supporting layer with streak groove portions and concave portions forming a dot pattern, where each dot has a concave surface with an approximately spherical cap or cone shape, enhancing recognition accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dot pattern is formed on the upper surface of the metal supporting layer by etching, then the dot pattern can be provided for tracking the wiring circuit board, but streak grooves formed during metal sheet rolling cause recognition errors of the dot pattern
Solution Approach 1:
The patent applies local quality by creating concave portions with specific geometric characteristics (spherical cap or cone shape) at the locations where dots are needed for the dot pattern. These localized concave structures with controlled depth and shape differ from the surrounding streak groove portions, enabling selective recognition of dot pattern elements while suppressing interference from the streak grooves formed during metal sheet rolling.
2Measurement precision
If the concave portions are made with spherical cap or cone shape, then the concave surfaces become more recognizable than streak groove portions, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies parameter changes by controlling the depth parameter of the concave portions relative to the streak groove portions. By setting the depth of each concave portion to be greater than or equal to the depth of streak groove portions (D2 ≥ D1), the invention creates a clear depth parameter distinction that enhances recognizability. This parameter-based differentiation allows simple formation methods to achieve the desired geometric shapes without excessive manufacturing complexity.
Data Source
AI summary
A wiring circuit board includes a metal supporting layer, an insulating base layer, and a wiring layer. The wiring circuit board further includes a plurality of streak groove portions disposed on one surface of the metal supporting layer in the thickness direction and a plurality of concave portions depressed in the metal supporting layer in the thickness direction. The plurality of concave portions forms a dot pattern. Each of the dots in the dot pattern has one concave surface. The concave surface has an approximately spherical cap shape or an approximately cone shape.